The most famous U.S. coin, struck but never circulated due to the 1933 gold recall; one sold for $18.9 million in 2021.
Considered the first U.S. silver dollar, with immense historical significance; a high-grade specimen sold for over $10 million in 2013.
Known as the "King of American Coins," struck in the 1830s for diplomatic gifts; a Class I coin fetched $4.1 million at auction.
Shrouded in mystery with only five known specimens, produced clandestinely; one sold for $3.7 million, highlighting its rarity.
An exceptionally rare $10 gold piece with only four known specimens, struck as diplomatic gifts; auction prices exceed $2.5 million.
Unique with just one known example, struck for the cornerstone of the San Francisco Mint; valued around $6 million.
Exceedingly rare $5 gold coin with only three known examples, one in private hands; last sold for over $8 million.
A proposed $50 gold coin never officially produced, with only two examples in private collections; estimated value around $10 million.